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TIL in 1943 to save copper for WWII production, the US Mint made pennies from steel with a coating of zinc. These pennies had a silver appearance rather than the traditional copper coloring.

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9YBPD TIL In 2001, the Mossad dispatched undercover agents in London to monitor a top Syrian official. On the first day of his visit, one team followed him, while another broke into his hotel room and hacked his laptop. In 2007, Israel would launch a night time airstrike against a Syrian nuclear actor.
Axjg TIL Matt Stone and Trey Parker wanted to make a spoof of “The Day After Tomorrow”, called “The Day After The Day After Tomorrow”. It was going to be a shot-for-shot puppet remake , and they wanted to release it the day after the original film. Their lawyers advised them against it.
6EXgJ TIL people are more likely to donate to a sick dog than a sick child. A charity ran an experiment where they asked for money and exchanged the picture of a child for that of a dog. More people chose to donate to the dog.
mxRlY TIL one gram of activated carbon has a surface area in excess of 3,000 m2 (32,000 sq ft)
v17eK TIL If Holly (Ilex aquifolium) finds its leaves are being nibbled by deer, it switches genes on to make them spiky when they regrow. So on taller Holly trees, the upper leaves (which are out of reach) have smooth edges, while the lower leaves are prickly